Brake arrangement



54am. 6, W4 9. J. LEDWINKA 2,481,127

BRAKE ARRANGEMENT Original Filed Sept. 17, 1943 I INVENTOR 1 2- Jaseph Ledwmka,

ATTORNEY apication Serial No. 502,721 filed September 17, plete the box cross-section.

34 of F 1 and an actuating cylinder 34 interconnecting the In the drawings, the truck frame to which the 35 lev r arms at the nds of th levers ppos th invention is shown applied consists mainly of two; ends carrying the respective shoes. longitudinally extending side members Hl inter- Each brake unit comprises a bracket clamped connected by a pair of spaced transoms, as II. firmly to the tubular support at 35 and having Patented 1 4 r 2,481,127

UNITED STATES PATENT OFFICE 2,481,127 BRAKE ARRANGEMENT Joseph Ledvvlnka, Philadelphia, Pa., assignor to The Budd Company, Philadelphia, Pa., a corporation of Pennsylvania Original application September 1'7, 1943, Serial No. 502,721. Divided and this application Septembei' 4, 1946, Serial No. 694,796

2 Claims. (Cl. 188-59) 2 application is a division of copending as by electric welding to the flanges It to com- 1943 for Railway truck, now U. S. Patent Number At each end of the truck between the wheels 2,425,282. M and the adjacent transom H is a tubular The present invention relates to the brake transverse member 24 which extends through arrangement for association with the truck strucopenings in the wall plates l5 of the side frame ture of said 'prlor application or with a difierent members I. This tube is secured to the latter truck structure.

It is an object of the invention to simplify the a rubber sleeve or bushing 21 interposed between support of the brake mechanism and to provide 10 them. The outer metal sleeve is welded in the for the cushioned support of said mechanism to openings of and forms an additional transverse carry the gravity load substantially wholly from connection between .the plates l5 of the side longitudinal side members of the truck which frames ID. has tilting movement with respect to the wheel The rubber bushings cushion the vertical or and axle assemblies supporting them. gravity loads of the transverse member 24, which It is a further object to provide simple and serves as a brake supporting member, and also emcient means for transmitting the torque load permit the relative tilting movements between to the truck .frame in such manner as to have the side frame members and the axle without no substantial efl'ect upon the springing of said placing undue strain on the parts. frame. 2o lateral movement of the tubular support 24 These and other objects and advantages will is limited by collars 28 clamped about the tube become more fully apparent from the following inwardly of. the respective side frames I0 and detailed description when read in connection with a removable plate 29 at one end of the tubular In the drawings: bracket may have an additional iunction, not

Fig. l is a plan view of one-half of a truck necessary to describe herein. It not needed for showing the invention applied thereto. this additional function, it may obviously be re- Fig. 2 is a detail horizontal sectional view, on placed by another removable plate, similar to an enlarged scale, through the joint between the plate 29. v brake support and a side frame member of the 30 The tubular support 24 carries the brake units truck, and I 3| each including brake shoes 32 for cooperation Fig. 3 is a fragmentary vertical sectional elew the Opp i fac s 01 t dj ent disc 5 vational view taken substantially along the line brake levers 33, one associated with each shoe,

by I2, support the adjacent ends of the Side mem- 36, on which the intermediate portions of the hers, through suitable flexible joint structures, brake levers are pivoted at 31. not shownin detail herein, which spring the The torque exerted on each brake unit is taken side members from said assemblies and allow up and the brake unit is held in place by a longirelative tilting movement between the wheel and tudinally extending torque rod 38 which is 'inaxle assembly and the side members. The side serted by means of rubbercushions 39 between members ill thus function in a manner similar the free end of downward extension 36 of the to the usual equalizers. respective brake unit and a bracket 40 bolted or The wheel and axle assemblies comprise the otherwise secured to the bottom of the adjacent axles H which carry the wheels [4 with each of transom II. The transom, like the side frame which a brake disc I5 is shown associated. members I0, may be a built-up hollow box section Each side frame member is a. hollow box secstructure similar to said members, as clearly aption structure comprised of spaced vertical plates pears in Fig. 3. l5, having outwardly directed flanges l6 along With this arrangement, it will be seen that the their top and bottom margins. Strips 22 and 23, vertical or gravity loads are or the brake support substantially flat in cross section, are connected, carried substantially wholly through the rubber applied to other cushioned joints to the side frame members Ill,

- these joints also allowingthe necessary flexibility to avoid strain on the parts upon relative tilting of the side frame members and axle. The heavy braking torque, on the other hand, is substantially wholly transmitted in longitudinal direction to the truck frame, so as to have no substantial effect upon the truck frame springing.

while the invention has been herein described in connection with a specific truck structure and in detail, it will be understood that it can be types of-truck structures and with difierent detail and, such changes as would readily occur to those skilled in this art without departing from the main features of the invention are all intended to be covered in the appended claims.

What is claimed is:

1. In a brake arrangement, a wheel and axle assembly, a vehicle frame comprising longitudinally extending side members supported from the respective ends of said assembly, a brake rotor carried by said assembly, a transversely extending brake support carried wholly through cushioned joint structures on said side members, a brake unit carriedby said support and including a bracket removably clamped to said support, a brake lever pivoted intermediate its ends to said bracket, a brake stator carried by one end of said lever in cooperative relation to said rotor, and an actuating cylinder connected with the other end of said lever, said bracket having a substantially vertical extension, the free end of which is connected to transmit braking torque to said frame in a direction lengthwise thereof.

2. In a brake arrangement, a wheel and axle assembly, a vehicle frame comprising longitudinally extending sidemembers supported from the respective ends of said assembly, a brake rotor carried by said assembly, a transversely extending brake support carried wholly through flexible joint structures on said side members, a brake unit carried by said support and including a bracket removably but rigidly secured to said support, and itself carrying a stator in cooperative relation to said rotor, a brake lever and an actuating cylinder. and a connection between said bracket and the frame for transmitting braking torque to the frame in a direction lengthwise thereof.

JOSEPH LEDWINKA.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS 

